The Analysis Of Seismic-driven Reservoir Modeling

At present,oil and gas field exploration and development gets more and more mature,how to integrate the data with different resolutions and scales,such as geology data,seismic,log data to establish a higher resolution 3D reservoir model,so as to realize the fine description of reservoir distribution and heterogeneity,then to guide the oil-gas exploration and development,has very important significance.The seismic-driven modeling method is a recent-proposed method,it integrates log data and seismic data in the process of modeling and considers they are both the hard data.The seismic-driven modeling method makes full use of seismic data,avoids to calculate variogram of the geo-statistical method,computes weighted coefficient based on the spatial correlation of seismic data.This method can reduce the uncertainty of the reservoir property estimation when the well spacing is large and reservoir heterogeneity is strong.Through constant research in recent years,seismic driven modeling has been able to integrate pre-understanding geology and sedimentary mode to establish a high precision 3D reservoir model which vertical resolution consistent with log data and horizontal resolution consistent with seismic data.However,it can’t be directly used in reservoir numerical simulation at present.This study based on the geologic model which established by seismic driven,according to the conventional process of geological model into reservoir model,introducing the thought of seismic-reservoir closed loop.Through the establishment of rock physics model,attempts to introduce geophysical information to the time-depth conversion and model upscaling process.In the actual geological model as the foundation,analysis of the change of the synthetic seismic response,then to constraint and update time-depth conversion and model upscaling process,formed a new seismic-reservoir closed loop process.This process can further improve the precision of the reservoir model and maintain the original seismic response characteristics,and lay a solid foundation for the later reservoir numerical simulation.